org.dcache.xrootd.protocol.messages.ErrorResponse.java Source code

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Here is the source code for org.dcache.xrootd.protocol.messages.ErrorResponse.java

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/**
 * Copyright (C) 2011-2018 dCache.org <support@dcache.org>
 *
 * This file is part of xrootd4j.
 *
 * xrootd4j is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * xrootd4j is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with xrootd4j.  If not, see http://www.gnu.org/licenses/.
 */
package org.dcache.xrootd.protocol.messages;

import com.google.common.base.Strings;
import io.netty.buffer.ByteBuf;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.dcache.xrootd.protocol.XrootdProtocol;

import static java.nio.charset.StandardCharsets.US_ASCII;

public class ErrorResponse<T extends XrootdRequest> extends AbstractXrootdResponse<T> {
    private static final Logger LOGGER = LoggerFactory.getLogger(ErrorResponse.class);

    private final int errnum;
    private final String errmsg;

    public ErrorResponse(T request, int errnum, String errmsg) {
        super(request, XrootdProtocol.kXR_error);
        this.errnum = errnum;
        this.errmsg = Strings.nullToEmpty(errmsg);
        LOGGER.info("Xrootd-Error-Response: ErrorNr={} ErrorMsg={}", errnum, errmsg);
    }

    public int getErrorNumber() {
        return errnum;
    }

    public String getErrorMessage() {
        return errmsg;
    }

    @Override
    public int getDataLength() {
        return 4 + errmsg.length() + 1;
    }

    @Override
    protected void getBytes(ByteBuf buffer) {
        buffer.writeInt(errnum);
        buffer.writeBytes(errmsg.getBytes(US_ASCII));
        buffer.writeByte('\0');
    }

    @Override
    public String toString() {
        return String.format("error[%d,%s]", errnum, errmsg);
    }
}